/**
 * precision.cpp
 *
 * What happens when we format numbers
 *
 * Written by:    Simon Parsons
 * Last modified: 16th October
 *
 **/

#include<iostream>
using namespace std;

int main(){

  double pi    = 3.1415927;
  double small = 0.000235;

 // No restriction on precision

 cout << endl;
 cout << "No restriction on precision" << endl;

 cout << pi << endl;
 cout << small << endl;

 // Now make precision 8

 cout << endl;
 cout << "Now make precision 8" << endl;

 cout.precision(8);
 cout << pi << endl;
 cout.precision(8);
 cout << small << endl;

 // Now make precision 2. This prints the specified number
 // of significant figures --- that is it ignores leading zeros.

 cout << endl;
 cout << "Now make precision 2" << endl;

 cout.precision(2);
 cout << pi << endl;
 cout.precision(2);
 cout << small << endl;

 // Now make precision 3 and fixed. The ios::fixed
 // forces all the output to have exactly the number of
 // digits after the decimal point that are set by precision().

 cout << endl;
 cout << "Now make precision 2 and ios::fixed" << endl;

 cout.precision(2);
 cout.setf(ios::fixed);
 cout << pi << endl;
 cout.setf(ios::fixed);
 cout.precision(2);
 cout << small << endl;


 cout << endl;
return 0;
}